Nun’s place is perfect. It’s spacious, clean, and cool. It’s got a great view of Bangkok as well and there’s a security desk 24 hours a day. Ari is a pretty quiet neighborhood, but seems to be up and coming. Great coffee joints and somewhat central to all the districts. The BTS is easy to navigate and takes you to a lot of the cool spots.
Districts are spread out so best to take a cab or uber to the farther away spots like Thonglor.